// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_

#include "content/browser/renderer_host/event_with_latency_info.h"
#include "content/common/input/input_event_ack_state.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "third_party/WebKit/public/platform/WebInputEvent.h"

namespace content {

// Provided customized ack response for input events.
class CONTENT_EXPORT InputAckHandler {
public:
    virtual ~InputAckHandler() { }

    // Called upon event ack receipt from the renderer.
    virtual void OnKeyboardEventAck(
        const NativeWebKeyboardEventWithLatencyInfo& event,
        InputEventAckState ack_result)
        = 0;
    virtual void OnMouseEventAck(const MouseEventWithLatencyInfo& event,
        InputEventAckState ack_result)
        = 0;
    virtual void OnWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
        InputEventAckState ack_result)
        = 0;
    virtual void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
        InputEventAckState ack_result)
        = 0;
    virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
        InputEventAckState ack_result)
        = 0;

    enum UnexpectedEventAckType {
        UNEXPECTED_ACK,
        UNEXPECTED_EVENT_TYPE,
        BAD_ACK_MESSAGE
    };
    virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) = 0;
};

} // namespace content

#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ACK_HANDLER_H_
